Off-Grid Inverters

MS-Series Pure Sine Wave Inverter/Chargers

The MS Series inverter/charger is a sine wave inverter designed for the most demanding mobile and off-grid applications. The MS Series inverters are powerful, easy to use, and are available in 12-, 24- and 48-volt versions. The MS4024 can be series stacked, using the ME-SSI, for 120/240 VAC operations, and 8kW total output. The MS2012-20B has two 20-amp AC breakers built in. The M4024-PAE and MS4448-PAE have 120/240VAC split-phase output, eliminating the need to stack two units or buy a transformer to run 240-volt loads. As many as four MS-PAE inverters can be paralleled for larger systems up to 17.6kW with 120/240VAC split-phase output (ME-RTR router required).

Mount the MS Series on a shelf or bulkhead, even upside down, or use Magnum’s integration hardware in Power Systems section. The aluminum base and cover provide noise reduction and corrosion resistance. The MS Series has an RS-485 communication port and a remote control port. The MS Series front panel has an on/off switch with an LED indicator. All models have a 50-amp transfer relay. The ME-RC50 controller is required for inverter programming.

The MS Series is ETL Listed to UL/cUL 458 for mobile use and UL 1741 for off-grid installations. Dimensions: 13.75 x 12.65 x 8 inches. 3-year warranty, except MS4024-PAE and MS4448-PAE which have a 2-year warranty. Made in USA. See Power Systems section for Magnum’s integration hardware for MS and MS-PAE inverters.

FX and VFX Off-Grid Inverter

The sealed, externally fan-cooled OutBack FX is designed to survive harsh environments. The higher powered ventilated VFX version is a better choice in high ambient temperature applications or where generator-powered battery charging is an important part of system battery charging.

Each inverter/charger is a complete power conversion system – DC to AC inverter, battery charger and AC transfer switch. Additional inverter/chargers can be added at any time either in parallel (120VAC), series (120/240VAC), or even three-phase (120Y208 VAC) configurations, allowing the system to be tailored to the specific needs of the application, both at the time of installation and into the future. With the addition of an X-240 autotransformer, multiple inverter systems can be set up to provide 120/240 VAC split-phase output with the ability to provide full power on either 120VAC leg of the system. Up to 10 inverters can be connected together to provide up to 36 kW of continuous power capacity with the use of the HUB and the MATE controller. The inverter’s powerful battery charger operates in five stages: BULK (constant current output), ABSORB (constant voltage output), FLOAT (reduced voltage output), SILENT (no charger output) and EQUALIZE (constant voltage regulation overcharging). Charge time in each stage is adjustable to provide control and to maximize the performance of the charger and battery system.

Each OutBack inverter has a programmable, auxiliary relay output connection (AUX) that provides 12VDC output to run 12V cooling or ventilation fans or operate an external relay to perform other functions, such as remote generator starting (two-wire), to disconnect external charging sources (such as PV), or to turn on a diversion load for voltage regulation. Note: The AUX relay is used to power the external cooling fan of the FX sealed inverters, so it is not available for other uses.

The transfer switch is rated for 60 amps. When an external source of AC power (either a generator or the utility grid) is detected at the “AC in” terminal on the inverter, the switch operates to transfer the loads to the external power source, and then activates the battery charger to re-charge the battery bank.

Inverters with an M-suffix are an RV/marine version. They have a transfer switch that switches hot and neutral. Dimensions: 16.25″ L x 8.25″ W x 11.5″ H. ETL Listed to UL 1741 for the U.S. and Canada. Standard 2-year warranty with an available 5-year extended warranty.

Schneider Electric (Formerly Xantrex)
Xantrex XW Sine Wave Battery-Based Inverter System

The Schneider Electric Xantrex XW Series hybrid inverter/charger has an innovative, integrated design that minimizes external balance-of-system components allowing for quick and easy installation as either a grid-tie battery-backup system or a fully off-grid power system. The XW offers split-phase 120/240VAC output from a single inverter. Up to 4 inverters can be paralleled for up to 24kW of total output in a 120/240V split-phase system, or operate in a 208VAC 3-phase configuration with up to 2 inverters per phase (6 inverters total) for up to 36kW of power. Models are also available for 230V or 400VAC three-phase at 50Hz for overseas operation. Charge controllers, such as the Schneider XW60-150 or the XW80-600, are required for use with any PV array (see the Charge Controller section for more information on these controllers).

High surge capacity is achieved by using digital control to regulate the output voltage from dropping during surge. Efficient, power-factor-corrected, high-current multi-stage battery charging minimizes recharge time and electricity/fuel costs. Dual AC inputs (grid and generator). Full control of generator with optional automatic generator start (AGS) unit. Configurable auxiliary relay output of 250mA at 12VDC included in each inverter.

The inverter display panel shows status at a glance. LEDs indicate AC-in status, faults/warnings, equalize mode, and battery state of charge. Three-character LED indicates output power or charge current. A battery temperature sensor is included with each inverter, but only one is needed per system.

Grid-Tied Inverters

Sunny Boy SB700

The SB700 has a 120 VAC output and three different configurable input voltage ranges. The 120 volt output allows it to be used on 120/240 VAC systems as well as 208 VAC systems. Evergreen ES-A modules and typical 60-cell grid-tie modules cannot be used with this inverter because their voltage is too low to reach the MPPT voltage of this inverter before exceeding the maximum wattage allowed. It can be used with SANYO modules and with 36-cell and 72-cell modules. The SB700 is housed in a completely sealed stainless steel enclosure. Outdoor installation is recommended for the sealed inverters so natural air-flow can cool the heat-sink.

Sunny Boy 2000HFUS / 2500HFUS / 3000HFUS Grid-Tie Inverters

Featuring world-class efficiency, a slim-line enclosure and reduced weight, the Sunny Boy HF series of inverters can be mounted in between wall studs, making it a good choice for new construction and space-constrained retrofits. Installation is simplified by automatic grid voltage detection and field configuration for positive ground. An input voltage range of 175 to 600 volts allows this inverter to work with a wide variety of module types and makes string sizing easier. The modern graphic display and wireless Bluetooth communication system also makes the new Sunny Boy easy to use.

Also available for the HFUS series are an installation frame for integration in between studs in wood-framed walls and an RS-485 communication unit multi-function relay.

UL Listed for the U.S. and Canada.

Sunny Boy 3000US and 4000US

The compact design of the Sunny Boy 3000US, 3800US, and 4000US inverters makes them suitable for residential and light commercial use and the integrated DC disconnect helps keep installations cost effective. They are field configurable for positive ground systems. The 3000US and 4000US are auto-sensing for use on 240 and 208 VAC applications. The 3800US is for 240VAC only, and is specifically sized for buildings with a 100A service entrance panel (16A max AC current). They come with a DC disconnect and a 4-circuit integrated fused series string combiner that can be used with fuses up to 20 amps. It is shipped with 15-amp fuses. Now ARRA compliant.

Sunny Boy 5000US / 6000US / 7000US / 8000US

The 5000US, 6000US and 7000US can be used in 208, 240 and 277 VAC applications. The 8000US can be used in 240 and 277 VAC applications. These inverters also come with a DC disconnect switch that connects to the bottom of the inverter. The disconnect has a 4-circuit integrated fused series string combiner that can be used with fuses up to 20 amps. The disconnect also has an input main lug for array DC input if the system has a separate combiner box. It is shipped with 15-amp fuses. All four models are field-configurable for positive ground systems. All inverters are compliant with UL 1741, UL 1998, IEEE-929, IEEE-1547, FCC Part 15 A & B. SMA inverters have a standard 10-year warranty. Now ARRA compliant.

Grid-Tie Microinverter System

The Enphase Energy Microinverter System improves energy capture, increases reliability, and dramatically simplifies design, installation and management of solar power systems. The Enphase System includes the Microinverter, the Envoy Communications Gateway, and the web-based Enlighten monitoring and analysis service.

Each Microinverter is a fully-integrated device that converts the DC output from a single PV module into grid-compliant AC power. The microinverter system is designed to maximize energy harvest, increase system reliability and dramatically simplify design, installation and system management while also improving safety.

The power from each PV module is individually tracked by a Microinverter, eliminating losses caused by underperforming modules in the array. Microinverters help realize the full energy potential of every PV array, reducing the power-limiting effects of shading, dust, debris, module mismatch, and thermal differences. Problems are isolated to a small fraction of the PV array, while the rest of the PV system continues to function optimally. Service is simplified to routine maintenance.

Microinverters eliminate the need for string sizing exercises that require fitting equal lengths of module strings on a roof. Each PV module is connected directly to its own microinverter and mounted on the racking underneath. The microinverter’s AC wire harnesses are connected to form a continuous AC branch circuit that leads ultimately to the AC utility distribution center.

System safety is enhanced since all of the output wiring from the PV array is AC, and therefore doesn’t contain hazardous DC voltages once the AC power is shut down for service or emergency. If the AC to the array is shut off, only the DC voltage of a single module (typically under 50VDC) is present in the array creating a much safer situation for maintenance personnel or firefighters.